/usr/lib/x86_64-linux-gnu/libui-utilcpp.so is in libui-utilcpp-dev 1.8.5-1+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libui-utilcpp.so.9.0.0
/usr/lib/x86_64-linux-gnu/libui-utilcpp.so.9.0.0